Construction of flooring or the like



2 SHEETS-SHEET I.'

Patented Mar. 28, T922.

I. T. SENTROP, In. CONSTRUCTION 0F FLOORING 0R THE LIKE.

` .APPu'cATloN r|LED1uN`22.|91s'.

Mlons.

J. T. SENTHOP, In. CONSTRUCTION OF FLOORING OR THE LIKE.

APPLICATION FILED JUNE 22 I9I8- Patenwdmar. 28,1922.

2 SHEETS-SHEET 2.

nvww.

alike. On the other hand when more than one beam is required to span thespace only that end of the beam to anchor' into the wall of the buildingwillbe so formed, the other end of the beam being formed according tothe end illustrated in Fig. G.

The modified form of beam end illustrated in Fig. Yl is used when it isdesired to add strength to the floor to take up exceptional stress, thisform of end differing from that illustrated in Fig. G in that the pocket13 is inverted by extending the beam top 2 'to ccincide with theextended ends of the webs 3, and omitting the extension l of thetransverse wall base.

lfl a very cheap structure is desired and one not likely to be subjectedto heavy loads, the anchoring members and end walls may be omitted andthe beams formed of inverted channel shape in cross section shown inFig. Ll, with the inner and outer sides of the top, and webs parallelwith each other, and this form, with the addition of the end wallsserving as bases, can be used to advantage for floorings in buildings inwhich Y steel I beams are utilized as main bearei's.

iin example of one use is shown in Fig. 1l in which the beam end wallsrest upon the projecting fiange of the I-beain, the space between theend walls and the I-beam channel being filled in with concrete or cementmortar or the like.

The reinforcements I prefer to use consist of longitudinal side rods orbars 14 bent back upon themselves with their ends bound together as at15. These side rods are. enibedded in each of the lower parts as well asin both sides of the upper of the webs, lengthwise thereof and aresecured` together by a series of transverse stirrups 16 fastened to therods in .any preferred manner and spaced diminisl'iingly from the centretowards the ends ofthe rods, such rods with the stirrups presentingaskeleton v.frame of substantially inverted U-shape in cross section. Thelower portion of any ldesired number ol." the stirrups are provided withfastening clips 17 extending downwardly, the purpose of which will behereinafter explained.

ik typical method of forming the beams is illustrated in Fig. 8 whichshows the successive steps followed. A platform of suitable materialsueh as wet sand, indicated at is provided on which the outer sides ofthe mold frame 19 are laid, after which concrete sufficient to form afirst layer or base Q() pouredin. rThe skeleton reinforcements indicatedat 2l are then pressed into :the layer of concrete, the webs beinguppermost.V A second layer of concrete 2Q, is poured in to cover the topof the reinforcements andform the roof of the inverted channel. afterwhich the mold frame boards Q3, to forni the channel webs and those forthe beam ends (not shown) areplaced in position and additional concretepoured in to completely envelopthe skeleton reinforcements. lt will benoted that the mold boards for the sides of the beam, both inner andouter, are longitudinallyT outwardly curved as at 2t, the curvaturesbeing provided to give the fiares to the sides of the beam webs. Y

Before the concrete has fully set transverse openings Q5, the purpose ofwhich will be hereinafter explained, are formed through the extendedportions of the webs ,3, at such points that the openings in the webs ofall beams will register; and at the same time should accommodation beneeded for water pipes or the like such may be. provided for by formingopenings at suitable points in t-he beam.

Figure 2 illustrates the manner in which the flooring is laid to cover aspace too large to be spanned by a single beam length. The beams arelaid side by side in lines with the end formed according to Fig. 6resting and anchoring into the building. walls and the inner ends,formed according to Figure 5, rest on the customary intermediate wallsoiI main beams 26. The beams in one line are laid in staggered relationto those in the other line with the projecting webs of one line engagingwith or fitting within those of the other line.

In order to prevent lengthwise displacement of the beams and forstrengthening purposes, meta-l rods or bars 27 extending the full widthof the fiooring are inserted in the transverse openings 25 in the webends, such rods being fastened in any preferred manner to thereinforcing rods 2 of the webs. lVedge shaped strips of wood, or othersuitable material, indicated at 28, are laid length wise between thebea-nis and carried by the outer flared edges of the latter .and serveas a base for the concrete or cement mortar fillingbetween the beams'aswellas a inediuni from which wire or other materialV to form a,ceiling may be streteliedrand the clips l serve to connect the ceilingand the reinforcement formed thereby to the reinforcement within thebeam. Spaces are left below the wedge strips 28 to accommodate concreteor mortar cement filling, which keys the ceiling to the flooring base.

The longitudinal spaces between p the beams, the spacesV between theends of the beams and within the recesses and between the beam and sidewalls and main beams of the building are then filled in with concrete orcement mortar this having the effect of anchoring the beams together andto thewalls ofthe building and forming a complete inonolithic structure.To provide additional strength at the points of greatest stress, usuallytheends of the beams, any

suitable uantity of small sized metal scrap may be ac ded tothe-concrete mixture at such points. l.

there a `ceiling-is desired such may be formed of expanded metall :29 orother reinforcement stretched to the wedge strips 28, as alreadystated,and connected bythe clips 17 to the reinforcements inthe beams, theexpanded metal beingafterwards filled in with cement or other mortar andfinished ol'l' in any desired way. The` addition of a. ceiling connectedto the bottom of the fiooring as just described has ythe advantage byits connection to and close co-opcration with thereinforcement withinthe beams, of imparting additional strength to the flooring. The flareson the lower inside parts of the webs may serve to accommodate bases,such as metal plates, wooden blocks or the like which can bewedged inandV from which shafting, belting or the like may be hung.

From the foregoing vit will be apparent that the beams, whichinay be ofany desired dimensions and reinforcements, may.

be made wherever may be most convenient to the work Yor building eitherin the shop or adjacent the building being constructed.

While I have illustrated and described the interior of the beam as ofinverted channel shape in cross section and the exterior of key-stoneshape in cross section, itis obvious that variations of this formationmay be made with advantage and without departing from the spirit of myinvention. For instance, when an exceptionally heavy load is to becarried or an economy of vertin cal space is desired, the beam interiorcould be made of arci-form in cross section as shownin Fig. 9, or thepoints of junction of the inner sides of the webs and the top could becurved as shown in Fig. 10.

lWhat I claim is as follows l. In a monolithic structure comprising aplurality of reinforced concrete beams of channel form in lcross-sectionsaid. beams cach including a top portion and side webs. the upperportions of the outer surfaces of the webs inclining inwardly anddownwardly from said top portion and the lower port-ions of such outersurfaces inclining outwardly and downwardly with respect to saidinwardly inclined portions such inclinations forming a continuousunbroken line to the beam base, the oppositely inclined poru tions ofthe outer surface of each web being of substantially the same pitch asthe webs of the opposingbeams and forming an obtuse angle between them.

2. A reinforced concrete beam of channel form in cross-section,including a top portion and side webs the inner lower portions of whichlatter are flared towards each other to form supporting shelves and theouter surfaces of which incline inwardly from said top portion and flareoutwardly to form supporting shelves at their tending edges which aretop portion.

3. A reinforced concrete beam of channel form in crosssection, includinga top portion, side webs, theinner lower portions of which latter areflared and the outer surfaces of which incline inwardly from vsaid topportion and flare outwardly, to form supporting shelves, at theirlongitudinally extending edges which are remote from the top portion,`and a wall extending` transversely between the side webs near the endofthe channel beam, the outer surface of such trans versely extendingwall being outwardly inclined from said top portion.

4. A reinforced concrete beam of channel form in cross-section,including a top portion, side webs, the inner lower portions of whichlatter are flared and the outer surfaces of whichincline inwardly fromsaid top portion and Hare outwardly, to form supporting shelves Vattheir longitudinally extending edgeswhich are'remote from the topportion, and a wall extending' transversely between the sidewebs neartheend of the channel beam, the inner surface of said transverse wall beingsubstantially perpendicular to the top portion and the outer surface ofthe transverse wall being outwardly inclined with respect to the topportion.

5. A reinforced concrete beam `of channel form in cross-section,including a top portion, side webs and an end wall, portions of the saidwebs extending beyond the outer side of the end wall and forming withthe latter a recess at the end of the beam, the outer surfaces of theside webs being in wardly inclined from the top portion and thelongitudinally extending edges of the side webs which are remote fromthe top portion, being outwardly flared to form supporting shelves.

6. A reinforced concrete beam of channel form in cross-section,including a top portion, side webs and an end wall, portions of the sidewebs extending` beyond the outer side of the end wall and forming a.recess therewith at the end of the beam, the opposing inner surfaces ofthe extensions of the side webs being curved in the longitudinal planeof the beam, the curvature being concave at the juncture points of theweb extensions and end wall and convex towards the outer ends of theextensions.

7. A reinforced concrete beam of channel form in cross-section,including a top portion, side webs, the inner lower portions of whichlatter are flared and the outer surfaces of which incline inwardly fromsaid top portion and flare outwardly to form sup` porting shelves attheir longitudinally extending edges which are remote from the topportion, an end wall, portions of the side webs extending beyond theouter side of the longitudinally exremote vfrom thc llO end wall, anextension of the end wall extending in the longitudinal plane ol' thebeam from one edge of the end wall to and connecting the extensions ofthe side webs, the end wall and side web and end wall extensions iorminga recess at the end of the beam and the opposing inner surfaces of theextensions of the side webs being curved in the longitudinal plane ofthe beam, the curvature being concavev at the juncture points of `theside web extensions and end wall and convex towards the outer ends ofthe extensions.

8. An elongated reinforced concrete beam, the interior of which is ofinverted channel shape in cross section, and comprising a top, side websthe outer sides of which are inwardly inclined downwardly, a transversewall at each end closing the channel, the outer faces of such end wallsbeing downwardly outwardly inclined and each end of the beam beingprovided with anchoring members projecting beyond the transverse wallsand formed of extended portions oif the beam.

9. An elongated reinforced concrete beam the interior of which is ofinverted charniel shape in cross-section,and comprising a top, side websthe outer sides of which are inwardly inclined downwardly and both theinner and outer" lower .port-ions are outwardly flared, a transversewall at each vend closing the channel, such end walls being downwardlyoutwardly inclined, and eachV end of the beam being provided withanchor-V ing members projecting beyond the transverse walls and formedof extended portions or' the beam. Y

10. An elongated reinforced concrete beam of inverted channel shape incross-section, comprising a top, side webs and end walls, portions ofthe side webs extending beyond the end walls, such end walls with theei:-V

, JonANNns TH. snN-Tnor, n.

